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Question
Which one of the following statements is not true?
Options
In a house circuit, lamps are used in parallel.
Switches, fuses and circuit breakers should be placed in the neutral wire.
An electric iron has its earth wire connected to the metal case to prevent the user receiving a shock.
When connecting a three-core cable to a 13 A three-pin plug, the red wire goes to the live pin.
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Solution
Switches, fuses and circuit breakers should be placed in the neutral wire.
Explanation:
Switches, fuses and circuit breakers should be placed in the neutral wire. This statement is not true because switches, fuses, and circuit breakers must always be connected to the live wire, not the neutral wire. Placing these safety devices in the live wire ensures that when a switch is turned off or a fuse blows, the high-voltage current is completely cut off from the appliance. If they were connected to the neutral wire, the appliance would remain energised at high voltage even when turned off, posing a severe electric shock hazard to anyone who touches it.
